of billancourt



E. J. J. SALMSON. AERO-PLANE LANDING FRAME.

APPLICATION FILED MAR; 14. 1916.

Patented July 22, 1919.

EMILE JEAN JULES SALMSON, 0F BILLANCOURT, FRANCE, ASSIGNOR T0 SOCIETE DES MOTEURS SALMSON (SYSTEME CANTON-UNNE), OF BILLANCOURT, FRANCE.

AEROPLANE LANDING-FRAME.

Specification of Letters Patent.

Patented July 22, 1919.

' Application filed March 14, 1916. Serial No. 84,114.

To all whom it may concern Be it known that I, EMILE JEAN JULEs SALMsoN, citizen of the Republic of France, residing at 9 Avenue des Moulineaux, Billancourt, Seine, in the Republic of France, have invented m and useful Improvements in Areoplane Landing-Frames, of which the following is a specification.

This invention relates to an aeroplane landing frame in which the wheels are held by systems of two triangles each of these systems forming a fork for a wheel, and the triangles being pivoted by one of their sum mits to an axle fixed to the aeroplane in front of and parallel to the vertical plane passing by the axles of the wheels, the triangles being besides connected elastically by another summit to the aeroplane itself.

In the annexed drawing which illustrates aform of execution of the landing frame incorporating the invention,

Figure 1 is a front elevation view of the landing frame,

Fig. 2 is a side view of same.

Referring to the drawing it will be seen that the landing frame comprises systems of two triangles, each of these systems forming a fork which holds the wheel a. The plans of these triangles project themselves along the lines 5 and c of Fig. 1 and the sides of the triangles project themselves along lines de, ef, f-d of Fig. 2. These triangles are connected at their summits a? to members gfree to turn or pivot about an axle 9 solid with the aeroplane and arranged in front of and parallel to the vertical plane passing by the axles of the wheels. The triangles are connected to the aeroplane itself at their summits f'by means of any suitable elastic joint i, (rubber, spring, etc.).

The forks are held laterally by oblique tubes -or wires fwhich are connected to the pivoting axle 9.

When a wheel receives an impact it describes the circumference having cZ as center and d e as radius so that the wheel is lifted up and slips over the obstacle.

The right angled triangles 70 e (Z have during the movements of the wheel constant dimensions and consequently the bars or wires are only articulated on the axle g.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1.' An aeroplane landing frame comprising two triangular structures forming each a fork for a wheel of the frame and carrying said wheel by one of the summits of the triangle, a rod fixed to the aeroplane in front of and parallel to the axles of the wheels, means for pivotally connecting the front summits of both triangular structures to said rod independently from each other, and elastic joints connecting the rear summits of the triangular structures to the framing of the aeroplane.

2. An aeroplane landing frame comprising two triangular structures forming each a fork for a wheel of the frame and carrying said wheel by one of the summits of the triangle, a rod fixed to the aeroplane in front of and parallel to the axles of the wheels, means for pivotally connecting the front summits of both triangular structures to said rod independently from each other, elastic joints connecting the rear summits of the triangular structures to the framing of the aeroplane and oblique members adapted to brace laterally the triangular structures, each of said members being fixed at one end to the triangular structure at the summit where the wheel is supported and being pivoted to said rod at the other end.

In testimony whereof I have signed my name to this specification in the presence of 'two subscribing witnesses. 

